Frequencies for first 10,000 rows of ewarner variable in nhamcsed2015 dataset :

        Recode of EWARNE for |
 trending with data prior to |
                        2010 |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                       Blank |         57        0.57        0.57
                     Unknown |        497        4.97        5.54
              Not applicable |        738        7.38       12.92
                         Yes |      8,487       84.87       97.79
                          No |        221        2.21      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017